Robotics Worksheet: Gears – Speed or Strength

Robotics lesson 13: Gears: speed or strength · Set 70 · 40 questions

Robot tip (Trade speed for strength): Meshed gears turn opposite ways; in a row, odd-numbered gears turn like gear 1. Small drives big: slower, stronger. Big drives small: faster, weaker. The gear with fewer teeth turns faster. Open belt: same direction. Crossed belt: opposite direction.

1. 1.⚙️ An 8-tooth driver gear turns an 8-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) slower (c) faster
2. 2.⚙️ The gear fixed to the motor is called the … (a) driven gear (b) tyre (c) idler gear (d) driver gear
3. 3.⚙️ Pulley A turns anticlockwise and drives pulley B with a crossed belt (it makes an X). Which way does pulley B turn? (a) clockwise (b) anticlockwise
4. 4.⚙️ What are the bumps round the edge of a gear called? (a) tyres (b) spokes (c) teeth (d) pins
5. 5.True or false: “the output is weaker” happens when a small gear drives a big one. (a) True (b) False
6. 6.⚙️ Which gear set-up gives this: “good for a slow crane”? (a) small drives big (b) big drives small
7. 7.⚙️ A small gear drives a big gear. The big gear turns … (a) at the same speed (b) slower but stronger (c) not at all (d) faster and weaker
8. 8.True or false: “good for lifting loads” happens when a big gear drives a small one. (a) False (b) True
9. 9.⚙️ Which gear set-up gives this: “good for lifting loads”? (a) big drives small (b) small drives big
10. 10.True or false: “the output turns faster” happens when a big gear drives a small one. (a) True (b) False
11. 11.True or false: “good for a racing toy” happens when a big gear drives a small one. (a) False (b) True
12. 12.⚙️ A robot arm must lift a heavy load slowly. The motor’s driver gear meshes with a big gear. What kind of driver gear works best? (a) a big driver gear (b) a small driver gear
13. 13.⚙️ 3 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 3 turn? (a) clockwise (b) anticlockwise
14. 14.True or false: “the output is stronger” happens when a small gear drives a big one. (a) True (b) False
15. 15.⚙️ Which gear set-up gives this: “the output is stronger”? (a) big drives small (b) small drives big
16. 16.⚙️ A 24-tooth driver gear turns a 10-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) slower (b) at the same speed (c) faster
17. 17.⚙️ A big gear drives a small gear. The small gear turns … (a) not at all (b) slower but stronger (c) at the same speed (d) faster but weaker
18. 18.⚙️ 4 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 4 turn? (a) clockwise (b) anticlockwise
19. 19.⚙️ Pulley A turns clockwise and drives pulley B with a crossed belt (it makes an X). Which way does pulley B turn? (a) anticlockwise (b) clockwise
20. 20.True or false: “the output turns slower” happens when a small gear drives a big one. (a) True (b) False
21. 21.⚙️ Which gear set-up gives this: “the output is weaker”? (a) big drives small (b) small drives big
22. 22.⚙️ Two gears are meshed together. How do they turn? (a) the same direction (b) one up, one down (c) they do not turn (d) in opposite directions
23. 23.⚙️ Pulley A turns anticlockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
24. 24.⚙️ Which gear set-up gives this: “the output turns faster”? (a) big drives small (b) small drives big
25. 25.⚙️ A robot fan must spin very fast. The motor’s driver gear meshes with a small gear. What kind of driver gear works best? (a) a small driver gear (b) a big driver gear
26. 26.True or false: “good for lifting loads” happens when a small gear drives a big one. (a) True (b) False
27. 27.True or false: “the output is weaker” happens when a big gear drives a small one. (a) False (b) True
28. 28.True or false: “the output turns slower” happens when a big gear drives a small one. (a) False (b) True
29. 29.⚙️ Which gear set-up gives this: “the output turns slower”? (a) big drives small (b) small drives big
30. 30.⚙️ 3 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 3 turn? (a) anticlockwise (b) clockwise
31. 31.⚙️ 2 gears are in a row, each meshed with the next. Gear 1 turns clockwise. Which way does gear 2 turn? (a) anticlockwise (b) clockwise
32. 32.⚙️ 5 gears are in a row, each meshed with the next. Gear 1 turns anticlockwise. Which way does gear 5 turn? (a) clockwise (b) anticlockwise
33. 33.True or false: “good for a fast fan” happens when a big gear drives a small one. (a) False (b) True
34. 34.⚙️ Pulley A turns clockwise and drives pulley B with an open belt (no cross). Which way does pulley B turn? (a) clockwise (b) anticlockwise
35. 35.⚙️ Which gear set-up gives this: “good for a racing toy”? (a) big drives small (b) small drives big
36. 36.True or false: “the output turns faster” happens when a small gear drives a big one. (a) False (b) True
37. 37.⚙️ An 8-tooth driver gear turns a 20-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) at the same speed (b) faster (c) slower
38. 38.⚙️ Which gear set-up gives this: “good for a fast fan”? (a) big drives small (b) small drives big
39. 39.True or false: “good for a slow crane” happens when a small gear drives a big one. (a) False (b) True
40. 40.⚙️ An 8-tooth driver gear turns a 15-tooth driven gear. Compared with the driver, how does the driven gear turn? (a) faster (b) slower (c) at the same speed

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